[llvm] [SPIR-V] Rework usage of virtual registers' types and classes (PR #104104)

[Farzon Lotfi via llvm-commits]

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@@ -407,7 +393,7 @@ Register SPIRVGlobalRegistry::getOrCreateCompositeOrNull(
 
     // TODO: handle cases where the type is not 32bit wide
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farzonl wrote:

todo doesn't seem to make sense anymore.

https://github.com/llvm/llvm-project/pull/104104